<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>Document</title>
</head>

<body>

<div id="app">
  <h2 v-if="isShow">
    <div>abc</div>
    <div>abc</div>
    <div>abc</div>
    <div>abc</div>
    {{message}}
  </h2>
  <h1 v-else>isShow为false时，显示</h1>
</div>

  <script src="../js/vue.js"></script>
  <script>
    const app = new Vue({
      el:'#app',
      data:{
        message:'Hello',
        isShow:true
      }
    })
  </script>

</body>

</html>